Opposition leaders Garry Kasparov (2nd R), Sergei Gulyaev (2nd L) and other opposition activists shout slogans during a rally in St Petersburg June 9, 2007. Opposition protesters marched through St Petersburg on Saturday to demonstrate against President Vladimir Putin while he was hosting a huge conference for investors in his home city. Around 3,500 people marched peacefully through the historic city centre shouting "Shame on the Kremlin, shame on the authorities" and "Russia without Putin". REUTERS/Alexander Demianchuk (RUSSIA) 

Police detain local opposition leader and member of St Petersburg's legislative assembly, Sergei Gulyaev (C), during a protest in St Petersburg April 15, 2007. Russian police pushed dozens of anti-Kremlin protesters onto the ground and beat them with batons at the end of a rally in the tourist heart of St Petersburg on Sunday. REUTERS/Alexander Demianchuk (RUSSIA) 

Police detain local opposition leader and member of St Petersburg's legislative assembly, Sergei Gulyaev (2nd R), during a protest in St Petersburg April 15, 2007. Russian police pushed dozens of anti-Kremlin protesters onto the ground and beat them with batons at the end of a rally in the tourist heart of St Petersburg on Sunday. REUTERS/Alexander Demianchuk (RUSSIA) 

Police detains an opposition member of the local city parliament Sergei Gulyaev during a demonstration in Russia's second largest city of St.Petersburg, March 3, 2007. Several hundred Kremlin opponents, shouting "Russia without Putin", broke through police lines to block the main thoroughfare in St. Petersburg on Saturday.. REUTERS/Alexander Demianchuk (RUSSIA) 

Police detain an opposition member of the local city parliament Sergei Gulyaev (C) during a demonstration in Russia's second largest city of St.Petersburg March 3, 2007. Defying a police ban, a coalition of liberal opposition parties staged on Saturday what they called a "March of the Discontented" in St Petersburg to protest at the Kremlin's tightening grip on power. REUTERS/Alexander Demianchuk (RUSSIA) 

Police detain Sergei Gulyaev, an opposition member of the local city parliament, during a demonstration in Russia's second largest city of St.Petersburg March 3, 2007. Several hundred Kremlin opponents, shouting "Russia without Putin", broke through police lines to block the main thoroughfare in St. Petersburg on Saturday. REUTERS/Alexander Demianchuk (RUSSIA) 

Police detain an opposition member of the local city parliament Sergei Gulyaev (C) during a demonstration in Russia's second largest city of St.Petersburg, March 3, 2007. Defying a police ban, a coalition of liberal opposition parties staged on Saturday what they called a "March of the Discontented" in St Petersburg to protest at the Kremlin's tightening grip on power. REUTERS/Alexander Demianchuk (RUSSIA)